My husband, 2 teenagers and I have booked a 16-night stay at Mauna Lani Hotel & Bungalows in March / April. First time in Hawaii. Looking to create an itinerary, booking excursions now if we need to, and looking for suggestions to make the trip special. We are celebrating a good outcome of a serious health condition, so we'd like the trip to go well without being over planned! Also want to rent a car, but don't know what a good balance would be for days without and days with a car - or should we have a car for the whole time. I have reduced mobility due to an accident, so my days of serious hiking are over - unlike my husband and kids. This is creating challenges in knowing what kinds of experiences we can have. We are budget-conscious but can splurge sensibly, and realize one gets what one pays for... Any advice would be most appreciated re: excursions, car rentals, restaurants, beach swimming, etc.